Controlling device for printing machines



J 2, 1940- A. J. HORTON I 2,206,84 1

CONTROLLING. DEVICE FOR PRINTING MACHINES Filed Jan. 28, 1938 28 -"1INVENTOR g Patented July 2, 1940 PATENT OFFICE CONTROLLING DEVICE FORram'rmc moms- Albert J. Horton, White Plains, N. Y., assignor to R. Hoe& 00., Inc., New York, N. Y., a corporation of New York ApplicationJanuary 28, 1938, Serial No. 187,345

22 Claims.

possible damage, and inconveniences will be 6 avoided, due to chokesoccurring at or adjacent to the folding mechanism of the machine.

In printing machines, wherein the products require folding, the foldingmechanism usually includes a pair of cylinders having cooperating meansto fold the products as fast as they are delievered from the printingmechanisms. Chokes constituted by the accumulation of products at oradjacent this folding mechanism occasionally occur which may causeconsiderable damage, due to severe strains being imposed upon theadjacent machine parts, and inconvenience in that considerable time isrequired to free the choked products from the affected parts.

Before such chokes occur, or at least become suificiently developed tocause damage, one or more of several, conditions become existent. Amongthese conditions are, the absence of products being delivered,thedelivery of products at an improper time, the absence of a product on25 one of the folding cylinders at the proper time,

and the presence of a product on the folding cylinder at an impropertime. Whenever any of these conditions become existent, a choke may bein the process of development and, due to the rapidity of the machineoperation whereby the choke will rapidly develop to troublesomeproportions and to the, complicated nature of the printing machine,it-is generally impossible for an attendant to promptly observe theseindications of 35 a chokeand to avoid subsequent damage by preventingcontinuance of the fault in time.

Automatically operable means, including both mechanically andelectrically operated mechanisms have been provided,most of whichoperate 40 only after a choke has occurred, and by using the accumulatedproducts to operate an actuating member to stop the printing machine.These devices require the occurrence of a choke to operate them, whichin many instances is suflicient to impose severe strains upon themachine parts, or cause considerable inconvenience and loss of timeWhile the choke is being cleared.

One of the principal objects of this invention is n to provide a controldevice which is automatically operable to actuate controlling means fora printing machine in time to prevent disastrous and inconvenientchokes, especially at the folding mechj anism of such machines.

Another object is to provide means in a printinc machine to detect thepresence of a product at a predetermined position at an improper timeand to actuate control mechanism, when the product is so detected, toavoid possible damage, or further irregularities in machine operation.

Still another object is to provide a printing machine control mechanismwhich is automatically operable upon the absence or presence of 'aproduct in a position before the proper time therefor, to actuatesuitable devices to stop further operation of the printing machine orotherwise to interrupt the feeding of products therethrough or both. i i

A further object is to provide mechanically operated devices arranged todetect the absence or presence of a product at or adjacent to a machinepart during an improper interval in the operation of a printing machineand to actuate mechanism to stop the machine, or interrupt the flow ofproducts therethrough or both.

It is also an object of the invention to provide a control device forprinting machines, of generally improved construction, whereby thedevice will be simple, durable and inexpensivein construction, as wellasconvenient, practical, service-' able and eflicient in its use. i a

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts, and in the details of construction hereinafterdescribed and claimed.

An embodiment of the invention is illustrated in the accompanyingdrawing, wherein:

Figure 1 is a more or less diagrammatic illustration of an arrangement,and combination of features and devices constituting a control mechanismembodying thefeatures of this invention shown in cooperating associationwith the folding and delivery mechanism of a printing machine;

Figure 2 is a view of the same looking in the direction of arrow 2 inFigure 1;

Figure 3 is an illustration of a somewhat modified form of controlmechanism: and

Figures 4 and 5 are enlarged end and'side views respectively of certainparts of the form shown in Figure 3 whereby they are adapted to controla printing machine when the products are collected before folding. I

It will be understood that the invention is especially adapted for usewith printing machines wherein the products thereof are fed to foldingand delivery mechanisms. Herein is shown a continuous web ll being fedbetween a pair of cylinders and I3 havingcooperating mechanismforsevering the web II as indicated at H.

The severed web portion I5 is carried by the cylinder |2 as it rotateswith its shaft 26, into position to be acted upon by a folding blade l6which .directs it between a pair of folding rollers l1 and I8. Afterpassing between the rollers l1 and I8, the folded products are receivedone at a time by a fan wheel, or fly l9, and delivered therefrom onto asuitable receiving member (not shown). Suitable means, generally anelectric motor indicated diagrammatically at 2| is provided to drive theoperating parts of the printing machine and suitable interconnectingmechanism insures the proper timing of the various components of themachine for operating on the web and delivering the products in propertimed relation.

The particular point at which most chokes occur in printing or similarlyoperating machines is after severing the web, and as the severed productis folded. The products at this position occasionally accumulate,choking the mechanisms, whereby considerable damage thereto may result.At such times, the product may not be carried beyond the rollers l1 andI8 (as shown at 22) into proper position to be acted upon by the bladeIS. The product, under the above conditions, will not pass between therollers IT and I8. Such irregularity in operation, when it occurs,'is anindication that a choke is being developed, and immediate interruptionof the machine operation is desirable.

A mechanism for automatically detecting the above mentioned irregularityand to actuate devices to stop operation of the printing machine or anaffected portion thereof is herein disclosed. This mechanism is operatedby the absence of a product at a time when it should be present, or itspresence at an improper time below the rollers l1 and I8, or by'itspresence at animproper time or absence at the proper time, upon thecylinder l2 at 22.

The mechanism contemplates, in one instance, the interruption of theoperation of the printing machine, and, therefore, provision is made forinterrupting an electric circuit which controls the operation of themain driving motor 2| by opening a switch 23. It is also contemplated tointerrupt the feeding of the web II, and an elec- I trically operatedwebsevering means, or knife 24, is provided for this purpose. Theelectrically operated actuating means for the knife 24 is under controlof a solenoid switch 25.- A single solenoid 26 is arranged to operateboth switches 23 and 25 but it is obvious that one or the other switchmay be omitted if itis not desired to both stop the machine and severthe web.

Referring particularly to Figure 1, the printing machine is driven bythe motor 2|, when it is in regular operation. Another motor showndiagrammatically at 21 is used to drive the machine at slow speed whilepreparing the machine for operation, including the threading of the webtherethrough. Provision is herein included to prevent the operation ofthe devices of this invention while the motor 21 is being used, and toautomatically place them in operative condition as soon as the motor 2|is put in operation. This arrangement includes switches 28 and 29operated by a solenoid 3|, the switch 28 being in control of thesolenoid 26 to maintain it deenergized until the motor 2| is started,and the switch 29 being in control of the circuit through the switch 25controlling the web severing means 24.

, The motors 2| and .21 are shown connected to a line wire Ll by aconductor 32 and through rethem for spective resistances 33 and 34 by amovable contact 35 connected by a conductor 36 to one terminal of theswitch 23, the other terminal of which is connected to the line wire L2,When the contact 35 is moved into contact with the resistance 33,controlling the motor 2|, a circuit from the same through a conductor 31to the solenoid 3|, from which a conductor 38 leads to the motorterminal connected to the line wire M is closed to energize the solenoid3| and close the switches 28 and 29.

The mechanism shown for controlling the energization of the solenoid 26and through it the opening of the switch 23 to stop the motor 2| and toclose the switch 25 to actuate the knife 24 to sever the web comprises apair of mechanically operated devices adapted to detect the presence andabsence of a product, on the cylinder |2 at 22, in one instance, andbelow the rollers l1 and I6 at 39, in another instance. Each device isarranged in control of the solenoid 26 so as to energize it to stop themotor 2|, or actuate the knife 24 or both, when a product is present atthe respective positions 22 and 39 and also when a product is absent atthese positions at an improper time.

The devices are herein shown in Figures 1 and 2, as being operated by acommon actuating means constituted by a cam 4| mounted on the shaft 42of the cylinder l3. The cam 4| has two camming points 43 and 44 formedon its periphery whereby twice every revolution of the cylinder l3, aforked member 45 is given a downward stroke by means of a roller 46carried thereby, which cooperates with the camming points 43 and 44. Aspring 41 reacting between the forked member 45 and a machine frame part48 maintains the roller 46 in engagement with the periphery of the cam4|. The lower end of the forked member 45 is provided with a cross arm49 (Figure 2) having spaced apart studs 5| and 52 extending therefromand through arms 53 and 54 respectively, of a pair of bell cranks 55 and56. Springs 51 and 58 are provided to react between the cross-arm 49 andthe arms 53 and 54 respectively, t resiliently connect them for movementof the arms in a downward direction, and a collar 59 is secured to eachstud and 52 below the respective arms 53 and 54 to connect movement ofthe arms in an upward direction.

The bell cranks 55 and 56 are rockably mounted upon a suitably supportedshaft 6| and are provided with other arms 62 and 63 respectively, thearm 62 on the bell crank 55 extending upwardly, and the arm 63 on thebell crank 56 extending downwardly. The arm 62 is connected by a bar 64to an arm 65 extending upwardly from a sleeve 66, secured upon asuitably supported shaft 61. A product engaging finger 68 is secured tothe shaft 61 and extends therefrom toward the cylinder l2. The finger 68is adapted to enter a peripheral groove 69, provided in the cylinder 2for this purpose, when no prodnot is present at the position 22, and tobe prevented from entering the groove 69 by a product when one ispresent at 22.

Anelectric switch lever 1| (Figure 1) herein shown connected to thesleeve 66, is operated by rocking movement of the sleeve 66 (when thisis permitted by the finger 68 entering the groove 69), to engage aswitch contact 12 and close a circuit between it and an elongatedcontact 13.

When no rocking movement of the sleeve 68 is permitted (due to thefinger 68 encountering a product at 22 a circuit through the lever 'IIfrom the contact I3 and a switch contact I4 is maintained closed. Fromthe above, it will be understood that, when the forked member 45 isforced downwardly by-either of the points 43 or 44, the bell crank 55will tend to be rocked by the pressure imposed upon the arm 53 by thespring 51, and through the bar 64, the sleeve 66 will tend to be rockedto move the finger 68 into the groove 69 in the cylinder I2. Should aproduct be present at 22 at the proper time the circuit between thecontacts I3 and I4 will remain closed and that between contacts I2 andI3 open, but if a product is absent at 22 when it should be there, areverse arrangement of the circuitsis made due to the sleeve 66 beingpermitted to rock. Reversely, if the sleeve 66 is prevented from rockingdue to a product being present at 22 at an improper time the circuitbetween the contacts I3 and I4 will not be opened and the circuitbetween contacts I2 and 13 will not be closed.

In order to time the device so that the solenoid 26 will be energized toactuate the switches 23 or 25 or both when a product is either absent at22 at the proper time or present at an improper time, a cam I5(Figure 1) is provided having a raised peripheral camming surface I6 anda depressed surface 11. An electric switch arm I8 having a roller I9,riding on the periphery of the cam I5 is adapted to be swung between apair of contacts 8| and 82. The arm 18 engages the contact 9| when theroller I9 is riding on the raised cam surface I6, and engages thecontact 8| when the roller I9 is riding on the low surface 11. Thecontact 8| is connected by a conductor 63 to the contact I4 and thecontact 82 is connected by a con- ,ductor 84 to the contact I2. Thecontact .13 is connected by aconductor 85 to one terminal of the switch29, the other terminal of this switch being connected by a conductor 86.to the line wire L2. The switch arm 18 is connectedby a conductor 81 toone terminal of the switch 28, the other terminal of this switch beingconnected by a conductor 88 to the coil of the solenoid 26, which isconnected to the line wire LI by a conductor 89.

The cam I5 is suitably arranged to be rotated in synchronism with thecylinder I3 and the surfaces I6 and II are positioned to be presented tothe roller I9 to actuate the switch arm I8 to engagethe contact 82during the interval a product should be present at 22, and to engage thecontact 8| during the interval no product should be there. From theabove, it will be understood that the solenoid 26 might be energizedtwice during a revolution of the cylinder I3 and cam 4|, should theproper contacts be engaged by the switch lever II and arms I8, tocomplete the circuit through the solenoid 26, first due to the improperpresence, and secondly, due to the improper absence of a product at 22,but will not be energized if a product is present at, or ,absent from22, at the proper time. i i

In order to similarly control the. energization of the solenoid 26,should a product be absent or present at improper times at the position39 belowthe rollers I1 and I8, the arm 54 of the bell crank 56 isconnected to a bar 9| suitably supported to be reciprocated towardandaway from the line of travel of a product passing from the rollers I1and I8 to the fan wheel or fly I9. A roller 92 is supported upon the end93 of the bar 9| and is adapted to enter a groove 94 provided in aroller 95 mounted upon a machine frame part 96 disposed between theaxially spaced apart portions 91 and 98 of the fan wheel I9. The roller95 is disposed adjacent the line of travel of the products between therollers I I and I8 and the fly I9 onthe opposite side thereof from theroller 92, so that'a product disposed therebetween will prevent theroller 92 entering the groove 94.

Imposition of pressure by means of the spring 58 upon the arm 54, due toeither of the cam points 43 or 44, will tend to slide the bar 9| tocause the roller 92 to enter the groove I4 when a product is not presentat 39. A switch bar 99 carried by the bar 9| constantly engages acontact I9I, connected by a conductor I92 to the switch 29 through theconductor 85. The bar 99 is adapted to engage a contact I93 (connectedto the contact 82 by a conductor I94), when the roller 92 is preventedfrom entering the groove 94 by a product passing from the rollers II andI8, and to engage a contact I 95 (connected to the contact 8| by aconductor I96), when no product is present at 39 and the roller 92passes the line of travel of the product and enters the groove 94.

In cooperation with the timing cam switch arm I8, the roller 92 willenter the groove 94 I 92 will be permitted to move and carry the bar 99into engagement with the contact I95 and through the contact 8|, engagedby the arm I8 at this time, cause the solenoid 26 to be energized. Whileonly one cam I5 is required in this instance, due to the controlsurfaces I6 and 11 thereof being adapted to be positioned in respect tothe arm I8, in correspondence with the presence and absence, orreversely, of a product at 22 and 39 respectively, it will be understoodthat a similar control cam may be provided for each device and also thateither device may be omitted if found desirable. It will also beunderstood that all of, the switches shown diagrammatically in thedrawing may be of known commercial types.

By associating either or both of the devices with a printing machine,especially in cooperation with the folding mechanism thereof, possiblechokes may be detected before theyidevelop and the machine stoppedbefore-any damage or inconveniences are experienced. For instance, theimproper absence and presence of a product at 22 and 39 is subjected totwo tests for every product cut from the web I and these tests are made,one before, and one after, folding. The detecting devices, constitutingthe control device of this invention are not necessarily limited for usein association with the folding devices-of a printing machine, as theyare obviously adaptable for use In connection with other parts ormechanisms thereof, or of like machines, to detect the presence orabsence of a product at improper inter-- vals, at any position wherechokes are liable to occur, during machine operation.

The modified arrangement shown in Figures 3,

In this arrangement the forked member 45 is'reciprocated by a cam II Imounted on the shaft 28 of the cylinder I2 to rotate therewith. The camI II has four similar camming surfaces H2, H3, H4 and H5 upon itsperiphery, upon which a roller II6 rides. The roller H6 is carried byone arm of a lever I I1 pivoted at I I8. The other arm I I9 of. thelever I I1 is secured to,the forked member 45 to move it downwardly tocompress the springs 51 and 58 for the purposes above described inrespect to the arrangement shown in Figures 1 and 2'.

In this modified arrangement, one of the folding blades I6 on thecylinder I2 is adapted to be silenced and the cylinder I3 is providedwith product engaging pins I I8. When products are to be collected, oneof the blades is made inoperative and the pins I III are made operativeto take every other product and carry it around the cylinder I3 andtransfer it to the cylinder l2 in assembly with the next productthereon. The collected products on the cylinder I2 are then folded bythe folding blade I6 and delivered to the delivery mechanism. When bothof the blades I6 are arranged to be operative and the pins III) are madeinoperative, the products are not collectedbut follow through the sameoperations as in the arrangement shown in Figures 1 and 2.

' In order to adapt the arrangement shown in Figures 3, 4 and 5 for usewhen either collected or non-collected products are to be acted upon,the cam for actuating the switch lever 18 is constructed by abuttingthree discs I2I, I22 and I23, each of which is adjustably secured to ashaft I24, driven in unison with the shaft 28 of the cylinder l2, andthe roller 19 is made sufiiciently long to extend across the three camsurfaces I23, I26 and I25. The disc I2I is provided with a raisedcamming 'surface I25 upon its periphery upon which the roller. 19 isadapted to ride to swing the switch lever 18 to the contact 8i to insurethe detection of the presence of a product at 39 and the absence of. aproduct at 22 when the forked member 45 ispressed down by the cammingfinger I I 3. The disc I22 islikewise provided with a raised cammingsurface I26 upon its periphery to similarly act upon the switch lever18, and when the discs are adjusted as shown in Figure 3, it insures asimilar detection of the next product at points 22 and 39 when theforked member 45 is pressed down by the camming finger II5. With thediscs thus arranged, when the depressed cam surfaces of the discs areengaged by the roller 19, the lever 18 is permitted to engage thecontact 82 to insure detection of the presence of a product at 22 andthe absence of one at 39 when the forked member 45 is pressed 7 down bythe camming fingers H2 and III.

The disc I22 is also provided with a median camming surface I 21 adaptedto hold the lever 18 in a neutral position I3I (Figure 3) intermediatethe contacts 8| and 82. The surface I 21 is positioned diametricallyopposite to the camming surface I 26. The disc I23 also is provided witha median camming surface I28, similarly adapted to hold the lever 18in'the neutral position I3I intermediate the contacts 8| and 82.

When the form of mechanism shown in Figures'3, 4 and 5 is to be used indetecting the presence and absence of a product at 22 and 39 of productsthat are not collected, the parts are arranged as shown in Figure 3. Inthis arrangement, both of the folding blades I6 are made operative andthe pins III) are made inoperative 11D. the usual manner. The cam discsI2I, I22 and I23 are adjusted on the shaft I24 with the raised camsurface I25 on the disc HI and the raised cam surface I26 on the discI22 disposed diametrically opposite and with the median surface I28 onthe disc I23 in axial alignment with the raised cam surface I26 on thedisc I22, so as to be inoperative. The cam surface I21 on the disc I22will likewise be inoperative by being disposed in axial alignment withthe cam surface I25 on the .disc I2I. When-the parts are so arranged andadjusted, the mechanism will act as in the preivizously described formshown in Figures 1 an When the mechanism is to be used in detecting thepresence and absence of collected products at 22 and 39, the parts arearranged as shown in Figures 4 and 5. In this arrangement, only one ofthe folding blades I6 on the cylinder I2 is operative, the other onebeing either removed or otherwise silenced, and the pins IIII are madeoperative so as to collect products as above described. The cam discsI2I, I22.and I23 are adjusted on the shaft I24 with the raised camsurface I25 on the disc I2I and the raised surface I26 on the disc I22in axial alignment to act on the lever 18 as one surface. The mediancamsurface I28 on the disc I23 is disposed to form in effect, acontinuation of the cam surface I21- on the disc I22 which is nowdisposed diametrically opposite in respect to the surfaces I25 and I 26.This arrangement will dispose the surfaces I28 diametrically oppositedepressed portions of the discs I2I and I22 which permit the lever 18 toengage the contact 82.

From the above, it will be understood that during one-half of arevolution of the cylinder I2 I when a product is taken by the pins IIIIon the cylinder I3 and no product is carried about the cylinder I2 norfolded therefrom, the mechanism is inoperative, due to the lever 18being maintained in the neutral position I3I by the cam surfaces I21 andI28. The mechanism operates to detect the presence and absence of thecollected products at 22 and 39, as above described, during thefollowing half revolution of the cylinder I2, due to the lever 18' beingacted upon by the depressed portion I29, to cause engagement withcontact 82, and then by the raised surfaces I25 and I26 of the discs I2Iand I22 to cause engagement with the contact 8|.

It will be understood that the invention may be embodied in otherspecific forms without departing from the spirit or essential attributesthereof, and it is therefore desired that the present embodiment beconsidered in all respects as illustrative and not restrictive, and itwill be further understood that each and every novel feature andcombination present in or possessed by the device herein disclosed formsa part of the invention includedin this specification.

What I claim is:

1. In a control device for a printing machine having a cylinder uponwhich a product is disposed at timed intervals, means to successivelydetect the presence of a product thereon in an interval when no productshould be present and the absence of a product thereon in an improperinterval when a product should be present, and to stop the machine.

2. In a. control device for a printing machine having a cylinder uponthe periphery of which a product is disposed at timed intervals, meansto successively detect the presence of a product thereon in an intervalwhen no product should be present, and the absence of a product thereonin an interval when a product should be present, and to prevent; furtherdisposition of products on said cylinder.

3. In a control device fora printing machine having a pair ofcooperatingdevices between which the printed material is passed from one to theother at regular intervals, and means to detect the presence of thematerial between said devices at a time when no material should bepresent, and alternatively to detect the absence of the material betweensaid devices at a time when material should be present, and when suchdetection occurs, to stop the machine.

4. Ina control device for a printing machine having a pair ofcooperating devices between which the printed material is passed fromone to the other at regular intervals, means to prevent the feeding ofthe material between said devices, and means to detect the presence ofthe material between said devices at a time when no material should bepresent, and alternatively to detect the absence of the material betweensaid devices at a time when material should be present, and when suchdetection occurs, to actuate said feed preventing means to interrupt thematerial feeding operation.

5. In combination in a machine wherein material is fed at regularintervals to a given point,

means to stop the feed of material to the given point, and a membermovable across the path of the material to detect the presence ofmaterial at said point at improper intervals and alternatively theabsence of material at said point when it should be present, and whensuch detection occurs, to actuate said material feed stopping means. i

6. In a printing machine controller, means to operate said machine, acylinder to which printed webmaterial is fed, means to cut products fromthe web and remove them from the cylinder at regular intervals, meanstointerrupt the feed of material to said cylinder, means to detect thepresence of cut products on said cylinder in an interval when noproductsshould be present, and to actuate said machine operating meansto stop the machine and to actuate said material feed interrupting meansto stop the feed of material to said cylinder.

7. In a mechanism for controlling a printing machine, first means tooperate said machine at slow speed, second means to operate said machineat higher speed, a member to whichprinted material is fed at regularintervals to be cut and folded, means to detect the presence of materialon said member at an improper interval and to actuate said secondmachine operating means to stop the machine, and an interlocking controlbetween said detecting means and said machine operating means to preventoperation of said detecting means when said first machine operatingmeans isin operation.

,8. In a control mechanism for a printing machine, a relay operabletostop said machine, a folding cylinder to which printed web material isfed to be cut and folded at regular intervals, a member moving to andfrom the path of the material to alternately detect the presence andabsence of material on said cylinder at improper intervals and arrangedto operate said relay.

9. In a control device for a mechanism adapted to fold a product, amotor for driving the said mechanism, an electrically operatedcontroller for the motor, a member having a regular movement into andout of the path of the product and moved in synchronism with themachine, and a m member.

switch operated by said member to affect the controller to stopoperation of the motor when a product is so positioned that itinterferes with the normal movement of the said member.

10. In a control device for a mechanism adapted to fold a product, amotor for driving the said mechanism, an electrically operatedcontroller for the motor, a first member and a second member each havinga regular movement into and out of the path of the product and moved insynchronism with the machine, a switch operated by each of said membersto affect the controller to stop operation of the motor when a productis so positioned that it interferes with the normal movement of eitherof thesaid members, and means to move each member into the path of theproduct while the product is passing the other 11. In a controlmechanism for a printing machine having a folding cylinder to whichprinted Web material is fed to be cut and folded, a detector memberdriven in synchronism with the machine and moving to and from the pathof the material to detect the presence of material on the cylinderduring an improper interval, and alternatively to detect the absence ofmaterial from the cylinder during an improper interval, a relay operableto stop the machine, a detector switch operably connected to thedetector member, and a timing switch driven in synchronism with themachine and cooperating with the detector switch to operate the relay.

12. In a control mechanism for a printing machine having a foldingcylinder to which printed web material is fed to be cut and folded, adetector member driven in synchronism with the machine and moving to andfrom the path of the material to detect the presence of material on thecylinder during an improper interval, and alternatively to detect theabsence of material from the cylinder during an improper interval, arelay operable to deflect the material away from the folding cylinder, adetector switch operably connected to the detector member, and a timingswitch driven in synchronism with the machine a and cooperating with thedetector switch to operate the relay.

13. In a control mechanism for a printing machine having a foldingcylinder to which printed web material is fed to be cut and folded toform products, folding rollers associated with the folding cylinder, adelivery fan to which the products pass from the folding rollers, adetector member driven in synchronism with the machine and moving to andfrom the path of the folded products passing from the folding rollers tothe fan, to detect the presence of a product between the folding rollersand the fan during an improper interval, and alternatively to detect theabsence of a product during an improper interval, a relay operable tostop the machine, a detector switch operably connected to the detectormember, and a timing switch driven in synchronism with the machine andcooperating with the detector switch to operate the relay.

14. In a control mechanism for a printingmae chine having a foldingcylinder to which printed web material is fed to be cut and folded toform products, folding rollers associated with the folding cylinder, adelivery fan to which the products pass from the folding rollers, adetector member driven in synchronism with the machine and moving to andfrom the path of the folded products passing from the folding rollers tothe fan, to detect the presence of a product between the folding rollersand the fan during an improper interval, and alternatively to detect theabsence of a product during an improper interval, a relay operable todeflect the material away from the folding cylinder, a detector switchoperably connected to the detector member, and a timing switch driven insynchronism with the machine and cooperating with the detector switch tooperate the relay.

15. In a control device for a printing machine having a folding cylinderand operated by a motor, an electrically operated controller for themotor, a detecting member having a movement toward and from the foldingcylinder, a switch connected to the detecting member, a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the cylinder, and its motion is notimpeded by a product on the cylinder,

if a product should normally be there at that time.

16. In a control device for a printing machine having a folding cylinderand operated by a motor, an electrically operated controller for themotor, a detecting member having a movement toward and from the foldingcylinder, a switch connected to the detecting member, a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the cylinder, and its motion is impeded bya product on the cylinder, if a product should normally not be there atthat time.

1'7. In a control device for a printing machine operated by a motor andhaving a folding cylinder, an electrically operated controller for themotor, a detecting member having a movement toward and from the foldingcylinder, a switch connected to the detecting member/a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the cylinder twice in succession, and itsmotion is not impeded by a product on the cylinder.

18. In a control device for a printing machine operated by a motor andhaving a folding cylinder, an electrically operated controller for themotor, a detecting member having a movement toward and from the foldingcylinder, a switch connected to the detecting member, a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the cylinder twice in succession, and itsmotion is impeded each time by a product on the cylinder.

19. In a control device for a printing machine driven by a motor andhaving folding rollers and a delivery fan, an electrically operated'controller for the motor, a detecting member having a movement into andaway from the path of a product passing from the folding rollers to thefan, a switch connected to the detecting member, and a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the path of the product, and its motion isnot impeded by a product if a productshould normally be there. at-thattime.

20. In a control device for a printing machine driven by a motor andhaving folding rollers and a delivery fan, an electrically operatedcontroller for the motor, a detecting member having a movement into andaway from the path of a product passing from the folding rollers to thefan, a switch connected to the detecting memher, and a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the path of the product, and its motion isimpeded by a product if a product should normally not be there at thattime.

21. In a control device for a printing machine driven by a motor andhaving folding rollers and a delivery fan, an electrically operatedcontroller for the motor, a detecting member having a movement into andaway from the path of a product passing from the folding rollers to thefan, a switch connected to the detecting member, and a timing mechanismdriven in sychronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine path ofthe product twice in succession, and its motion is not impeded of theproduct.

22. In a control device for a printing machine driven by a motor andhaving folding rollers and a delivery fan, an electrically operatedcontroller for the motor, a detecting member having a movement into andaway from the path of a product passing from the folding rollers to thefan, a switch connected to the detecting member, and a timing mechanismdriven in synchronism with the machine and in circuit with the switch;said switch and said timing mechanism being arranged to cooperate tocontrol the circuit of the said controller to stop the machine when thedetecting member moves toward the path of the product twice insuccession, and its motion is impeded each time by a product in the pathof the product.

ALBERT J, HORTON.

by a product in the path

